Below is my wife helping with the Mylar removal on the lower half of the playfield. Note that we are using the Goo-Gone and heat method. Today, I prefer the freeze method. However, whether you use heat or freeze, you will always have some residue left that will require some elbow grease and Goo-Gone.
Below is the area between the flippers that needed to be touched up. I wish I had a "before" picture but I don't. Basically, someone had painted it black where the wood was showing. I used a picture from the internet to help repaint that area.
Below is the playfield stripped for cleaning.